Clutch slip with sr swap? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TTZ33 · 05-10-2012, 08:47 AM

New member here. I swapped my sr from coup to my hatch. Clutch slipped a day or two later. So I put in a new one. Now this one is slipping and only drove the car 45 miles. Not beating it and its only a stock boost sr. The driveshaft looks like it sticks out more than I remember but both cars are non abs. Driveshaft is same one that was if the coup. Nico fest is this weekend and I need to get it going by tomorrow. Any help to include bashing me is appreciated.

DennisC · 05-10-2012, 08:13 PM

Did you adjust your clutch pedal?

shiftdrift · 05-10-2012, 08:27 PM

what slave cylinder are you using? you can't use a stock ka slave cylinder, it will put too much pressure on it and cause it to slip.

Sileighty_85 · 05-10-2012, 08:32 PM

Quote:

Originally Posted by DennisC

Did you adjust your clutch pedal?

Quote:

Originally Posted by shiftdrift

what slave cylinder are you using? you can't use a stock ka slave cylinder, it will put too much pressure on it and cause it to slip.

WTF These responses make no sense what so ever....

Clutch pedal adjustment makes no difference for when the clutch is engaged..

Slave cylinder makes no sense since the SR and KA one are the same once again does not matter once the clutch is engaged...

What clutch are you using and how much Torque is your SR making? and you do know there is a break in period longer than 45 miles.

shiftdrift · 05-10-2012, 08:36 PM

Quote:

Originally Posted by Sileighty_85

WTF These responses make no sense what so ever....

Clutch pedal adjustment makes no difference for when the clutch is engaged..

Slave cylinder makes no sense since the SR and KA one are the same once again does not matter once the clutch is engaged...

What clutch are you using and how much Torque is your SR making? and you do know there is a break in period longer than 45 miles.

slave cylinder actually does make sense, i know from experience (not the internet, actual working on a car) that a ka slave cylinder will not work with an sr, the piston is too long and keeps the clutch engaged a bit, causing the clutch to slip on throttle. i had to grind mine down roughly 1/4" for it to stop slipping, and that did completely solve it. anyways, you need to break in your clutch roughly 3-500 miles before actually boosting, did you re-surface the flywheel?

KiLLeR2001 · 05-10-2012, 08:54 PM

Anyone have pictures of SR next to KA slave cylinder? I've never heard of such differences before. Hell, Nismo offers the same slave cylinder for both KA/SR.

ps. I'm using a KA slave cylinder on my SR right now with no issues.

*fliprayzin240sx* · 05-10-2012, 09:28 PM

Quote:

Originally Posted by Sileighty_85

WTF These responses make no sense what so ever....

Clutch pedal adjustment makes no difference for when the clutch is engaged..

Slave cylinder makes no sense since the SR and KA one are the same once again does not matter once the clutch is engaged...

What clutch are you using and how much Torque is your SR making? and you do know there is a break in period longer than 45 miles.

Only thing is if the engagement is too high on the pedal, that you could potentially preloading the clutch. I've seen it happen once, adjusted the pedal engagement point lower and fixed the slipping issue.

Quote:

Originally Posted by shiftdrift

slave cylinder actually does make sense, i know from experience (not the internet, actual working on a car) that a ka slave cylinder will not work with an sr, the piston is too long and keeps the clutch engaged a bit, causing the clutch to slip on throttle. i had to grind mine down roughly 1/4" for it to stop slipping, and that did completely solve it. anyways, you need to break in your clutch roughly 3-500 miles before actually boosting, did you re-surface the flywheel?

KA and SR slaves are the exactly the same. Your issue is probably the TOB. TOB/carrier might have been shorter or taller.

Sileighty_85 · 05-10-2012, 09:42 PM

Quote:

Originally Posted by fliprayzin240sx

Only thing is if the engagement is too high on the pedal, that you could potentially preloading the clutch. I've seen it happen once, adjusted the pedal engagement point lower and fixed the slipping issue.

.

hmmm I dont knooowwww.....

The only way I could see that happening is if he adjusted the pedal after installation.

Cuz if it was like that before then he wouldnt be able to install the Slave cuz it wouldnt be allowed to compress it to bolt it down.

But i have seen some crazy shit before. lol

EDacIouSX · 05-11-2012, 12:59 AM

are you sure there is a clutch disk between the pressure plate and flywheel?

sorry, everyone else is trolling today so I just needed to get my troll in... If you have a new clutch, don't forget the flywheel may be worn down too much. you may need a new flywheel.

TTZ33 · 05-11-2012, 05:26 AM

Thanks for all the posts! Yes! There is a clutch plate. Both on the old and new. The "NEW" is a stock SR clutch, plate and wheel from a black top I picked up last year. Its "Like New" already broken in. The old clutch is an exidy. Three puck with matching plate. Stock fly wheel. Not the same stock fly wheel as the one I trued after the first slipping. The slave cylinder is KA. As is the clutch pedal. The engagement is at the top. Almost all the way out. I have a act six puck with plate and Fidanza wheel in the garage but its a trends. Its most likely going on tonight but adjustment seems like the best bet. I ran the 3one puck with no problems until I switched what car it was in.

bookoo · 05-11-2012, 06:16 AM

What year is the car?

Sohc cars have a different slave cylinder than dohc cars...I use a dohc...measure them then talk to me.

ST3ALTHPSYCH0 · 05-11-2012, 06:52 AM

Quote:

Originally Posted by TTZ33

Thanks for all the posts! Yes! There is a clutch plate. Both on the old and new. The "NEW" is a stock SR clutch, plate and wheel from a black top I picked up last year. Its "Like New" already broken in. The old clutch is an exidy. Three puck with matching plate. Stock fly wheel. Not the same stock fly wheel as the one I trued after the first slipping. The slave cylinder is KA. As is the clutch pedal. The engagement is at the top. Almost all the way out. I have a act six puck with plate and Fidanza wheel in the garage but its a trends. Its most likely going on tonight but adjustment seems like the best bet. I ran the 3one puck with no problems until I switched what car it was in.

Wow. I'm new and I'll admit to being shadetree at beat, and dangerous at worst, but my clutch grabs to low that I stall with a bit of frequency, and I've been driving a stick for 12 years (like ALWAYS had a manual through that time). I have a spare slave cyl off the SR tranny I bought last summer sitting in the tool box. We'll talk turkey if anyone can confirm that you don't have the correct unit.

TTZ33 · 05-11-2012, 08:48 AM

Swap was in a sohc car now in a Dohc car. This is not my first swap by any means but the first time this has happened. It does feel like partial engagement. Both clutches are in good shape. May sound crazy but I never adjusted a hydraulic clutch before. Never had to. Any pointers are welcome.

TTZ33 · 05-11-2012, 10:03 AM

Slave cylinder is new. That's the only thing that makes any sense. Im gona try to grind it today. Worst I can do is waste a s/c. A shorter stroke should give a stiffer engagement. I hope.

ST3ALTHPSYCH0 · 05-11-2012, 11:21 AM

Fully extended, the unit on my imported tranny is ~4 3/8". I snapped a pic if you want it uploaded

TTZ33 · 05-11-2012, 11:35 AM

4 3/8 tip to tip?

TTZ33 · 05-11-2012, 11:59 AM

Tip to tip?

ST3ALTHPSYCH0 · 05-11-2012, 12:11 PM

4 3/8 from the rear of the unit to the extended tip.

TTZ33 · 05-11-2012, 02:38 PM

Ok. So I measured the shaft its self since you can compress the cylinder. It is 2 3/4 inch. I had alot of tension on it while still on the cars ar and the fork moved almost 3/4 of an inch once it was unbolted. Time to grind. Hope this is the trick.

TTZ33 · 05-11-2012, 03:09 PM

Ok. So it took longer to put it on the lift than to fix it. You got to love days like that!

Thanks so much to SHIFTDRIFT! You nailed it. You are a giant among men.

Also thanks go out to ST3ALTHPSYCHO for parts digging and the photo! You can tell im not on Nico.

Grinder the shaft off at the end of the ball end. "1/4 inch". Then rounded it off. Clutch engages perfect!

ST3ALTHPSYCH0 · 05-11-2012, 04:06 PM

Quote:

Originally Posted by TTZ33

Ok. So it took longer to put it on the lift than to fix it. You got to love days like that!

Thanks so much to SHIFTDRIFT! You nailed it. You are a giant among men.

Also thanks go out to ST3ALTHPSYCHO for parts digging and the photo! You can tell im not on Nico.

Grinder the shaft off at the end of the ball end. "1/4 inch". Then rounded it off. Clutch engages perfect!

NICE! Wish my issue were so easy

Boost Barn · 05-29-2012, 08:02 AM

Dont get the slippage with the KA slave cylinder, beacuse thats whats on my car and i ran a 50trim t3/t4 on 14psi and made 285whp and 228tq on factory clutch and KA slave cylinder, 0 slip

Dorifto Machine · 05-29-2012, 11:04 AM

Weird, So is it confirmed that the KA slave is different than the SR slave or is it just the tip thats slightly further out ?

Im actually about to put my SR in and have a new KA slave I was going to use from my previous KA...

Boost Barn, Are you running a Ka-t or SR20?

Sileighty_85 · 05-29-2012, 11:10 AM

The tip to tip length is gonna vary depening on the spring inside pushing the pin outward.

You'll have to measure each part individually.

my 8 years dealing with SR's Ive never had an issue with the KA slave

NISR20MO · 05-29-2012, 11:49 AM

Glad you got it fixed but figured since I'm here... KA slaves are just fine on a SR, been there done that.

If your engagement is at the top of the pedal, it's not adjusted right, my whitebunny KA setup was like that when I adjusted to factory "pedal" freeplay spec (grabbed at the top, clutch assembly was much taller than stock). It was terrible to drive and slipped on my stock KA. I adjusted the clutch pedal engagement to where I liked the clutch to grab. Which put engagement pretty much a little bit closer to the floor than halfway through the pedal travel. Or right where the spring that assists with pedal return starts to work in reverse and would pull the pedal to the floor if your hydraulics weren't connected.

It grabs like a boss and drives soooo much better now.

The slave needs some freeplay before it starts pushing the clutch fork, you should be able to pull the slave pushrod out of the clutch fork dimple with your fingers ~1/3inch, and when you let it go it should stick itself right back into where it was. Have a friend adjust the rod, while you check freeplay at the slave.

Boost Barn · 05-29-2012, 11:52 AM

im running an s13sr20 in an s14

05-10-2012, 08:47 AM	#1
TTZ33 Join Date: May 2012 Location: York PA Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	Clutch slip with sr swap? New member here. I swapped my sr from coup to my hatch. Clutch slipped a day or two later. So I put in a new one. Now this one is slipping and only drove the car 45 miles. Not beating it and its only a stock boost sr. The driveshaft looks like it sticks out more than I remember but both cars are non abs. Driveshaft is same one that was if the coup. Nico fest is this weekend and I need to get it going by tomorrow. Any help to include bashing me is appreciated.

05-10-2012, 08:13 PM	#2
DennisC Zilvia Junkie Join Date: Dec 2010 Location: Elk Grove Posts: 581 Trader Rating: (9) Feedback Score: 9 reviews	Did you adjust your clutch pedal? __________________

05-10-2012, 08:27 PM	#3
shiftdrift Nissanaholic! Join Date: Nov 2009 Location: indiana Age: 31 Posts: 2,242 Trader Rating: (42) Feedback Score: 42 reviews	what slave cylinder are you using? you can't use a stock ka slave cylinder, it will put too much pressure on it and cause it to slip. __________________ SW Fab

05-10-2012, 08:54 PM	#6
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	Anyone have pictures of SR next to KA slave cylinder? I've never heard of such differences before. Hell, Nismo offers the same slave cylinder for both KA/SR. ps. I'm using a KA slave cylinder on my SR right now with no issues. __________________

05-29-2012, 11:10 AM	#24
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	The tip to tip length is gonna vary depening on the spring inside pushing the pin outward. You'll have to measure each part individually. my 8 years dealing with SR's Ive never had an issue with the KA slave __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

05-11-2012, 12:59 AM	#9
EDacIouSX Post Whore! Join Date: Nov 2004 Location: Los Angeles Age: 35 Posts: 4,527 Trader Rating: (53) Rides Gallery: EDacIouSX Feedback Score: 53 reviews	are you sure there is a clutch disk between the pressure plate and flywheel? sorry, everyone else is trolling today so I just needed to get my troll in... If you have a new clutch, don't forget the flywheel may be worn down too much. you may need a new flywheel.

05-11-2012, 05:26 AM	#10
TTZ33 Join Date: May 2012 Location: York PA Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for all the posts! Yes! There is a clutch plate. Both on the old and new. The "NEW" is a stock SR clutch, plate and wheel from a black top I picked up last year. Its "Like New" already broken in. The old clutch is an exidy. Three puck with matching plate. Stock fly wheel. Not the same stock fly wheel as the one I trued after the first slipping. The slave cylinder is KA. As is the clutch pedal. The engagement is at the top. Almost all the way out. I have a act six puck with plate and Fidanza wheel in the garage but its a trends. Its most likely going on tonight but adjustment seems like the best bet. I ran the 3one puck with no problems until I switched what car it was in.

05-11-2012, 06:16 AM	#11
bookoo Zilvia Member Join Date: Oct 2009 Location: tennessee Age: 32 Posts: 276 Trader Rating: (2) Feedback Score: 2 reviews	What year is the car? Sohc cars have a different slave cylinder than dohc cars...I use a dohc...measure them then talk to me.

05-11-2012, 08:48 AM	#13
TTZ33 Join Date: May 2012 Location: York PA Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	Swap was in a sohc car now in a Dohc car. This is not my first swap by any means but the first time this has happened. It does feel like partial engagement. Both clutches are in good shape. May sound crazy but I never adjusted a hydraulic clutch before. Never had to. Any pointers are welcome.

05-11-2012, 10:03 AM	#14
TTZ33 Join Date: May 2012 Location: York PA Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	Slave cylinder is new. That's the only thing that makes any sense. Im gona try to grind it today. Worst I can do is waste a s/c. A shorter stroke should give a stiffer engagement. I hope.

05-11-2012, 11:21 AM	#15
ST3ALTHPSYCH0 Leaky Injector Join Date: May 2012 Location: Chattanooga, TN Age: 39 Posts: 55 Trader Rating: (0) Feedback Score: 0 reviews	Fully extended, the unit on my imported tranny is ~4 3/8". I snapped a pic if you want it uploaded

05-11-2012, 11:35 AM	#16
TTZ33 Join Date: May 2012 Location: York PA Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	4 3/8 tip to tip?

05-11-2012, 11:59 AM	#17
TTZ33 Join Date: May 2012 Location: York PA Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	Tip to tip?

05-11-2012, 12:11 PM	#18
ST3ALTHPSYCH0 Leaky Injector Join Date: May 2012 Location: Chattanooga, TN Age: 39 Posts: 55 Trader Rating: (0) Feedback Score: 0 reviews	4 3/8 from the rear of the unit to the extended tip.

05-11-2012, 02:38 PM	#19
TTZ33 Join Date: May 2012 Location: York PA Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	Ok. So I measured the shaft its self since you can compress the cylinder. It is 2 3/4 inch. I had alot of tension on it while still on the cars ar and the fork moved almost 3/4 of an inch once it was unbolted. Time to grind. Hope this is the trick.

05-11-2012, 03:09 PM	#20
TTZ33 Join Date: May 2012 Location: York PA Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	Ok. So it took longer to put it on the lift than to fix it. You got to love days like that! Thanks so much to SHIFTDRIFT! You nailed it. You are a giant among men. Also thanks go out to ST3ALTHPSYCHO for parts digging and the photo! You can tell im not on Nico. Grinder the shaft off at the end of the ball end. "1/4 inch". Then rounded it off. Clutch engages perfect!

05-29-2012, 08:02 AM	#22
Boost Barn Leaky Injector Join Date: Nov 2011 Location: Greensboro, NC Posts: 52 Trader Rating: (0) Feedback Score: 0 reviews	Dont get the slippage with the KA slave cylinder, beacuse thats whats on my car and i ran a 50trim t3/t4 on 14psi and made 285whp and 228tq on factory clutch and KA slave cylinder, 0 slip

05-29-2012, 11:04 AM	#23
Dorifto Machine Zilvia Addict Join Date: May 2011 Location: Orlando Fl. Posts: 698 Trader Rating: (17) Feedback Score: 17 reviews	Weird, So is it confirmed that the KA slave is different than the SR slave or is it just the tip thats slightly further out ? Im actually about to put my SR in and have a new KA slave I was going to use from my previous KA... Boost Barn, Are you running a Ka-t or SR20?

05-29-2012, 11:49 AM	#25
NISR20MO Zilvia Junkie Join Date: Aug 2006 Location: Raleigh NC Age: 34 Posts: 490 Trader Rating: (29) Feedback Score: 29 reviews	Glad you got it fixed but figured since I'm here... KA slaves are just fine on a SR, been there done that. If your engagement is at the top of the pedal, it's not adjusted right, my whitebunny KA setup was like that when I adjusted to factory "pedal" freeplay spec (grabbed at the top, clutch assembly was much taller than stock). It was terrible to drive and slipped on my stock KA. I adjusted the clutch pedal engagement to where I liked the clutch to grab. Which put engagement pretty much a little bit closer to the floor than halfway through the pedal travel. Or right where the spring that assists with pedal return starts to work in reverse and would pull the pedal to the floor if your hydraulics weren't connected. It grabs like a boss and drives soooo much better now. The slave needs some freeplay before it starts pushing the clutch fork, you should be able to pull the slave pushrod out of the clutch fork dimple with your fingers ~1/3inch, and when you let it go it should stick itself right back into where it was. Have a friend adjust the rod, while you check freeplay at the slave.

05-29-2012, 11:52 AM	#26
Boost Barn Leaky Injector Join Date: Nov 2011 Location: Greensboro, NC Posts: 52 Trader Rating: (0) Feedback Score: 0 reviews	im running an s13sr20 in an s14

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode